Cranial cavity and contents Flashcards
sinuses are formed between the layers of which meningeal layer?
between the meningeal layer
2 layers - sinus - 2 layers
name the unpaired dural venous sinuses
superior sagittal sinus inferior sagittal sinus straight sinus intercavernous sinus basilar sinus occipital sinus
name the paired dural venous sinuses
transverse sinus sigmoid sinus caverous sinus superior petrosal sinus superior petrosal sinus inferior petrosal sinus sphenoparietal sinus
which venous components drain into the cavernous sinus
superior opthalmic vein
cerebral vein
sphenoparietal vein
the cavernous sinus drains to what venous stuctures
superior and inferior petrosal sinuses
then to the pterygoid plexus
where does the cavernous sinus lie
on either side of the body of the sphenoid bone (sella turcica)
on either side of the pituitary gland
what components are contained within the cavernous sinus
internal carotid artery
abducens (CN6)
what components are contained within the lateral dural wall of the cavernous sinus
oculomotor nerve (CN3)
trochlear nerve (CN4)
opthalmic division of trigeminal nerve (V1)
maxillary division of trigemnial (V2)
CN1
olfactory
CN2
optic
CN3
occulomotor
CN4
trochlear
CN5
trigeminal
CN6
abducens
CN7
facial
CN8
vestibulocochlear
CN9
glossopharyngeal
CN10
vagus
CN11
accessory
CN12
hypoglossal
olfactory nerve ->
cribiform plate
optic nerve –>
optic canal
with opthalmic artery
oculomotor nerve –>
superior orbital fissure
name the structures that pass through the superior orbital fissure
oculomotor nerve trochlear nerve lacrimal, frontal, and nasociliary branches of opthalmic nerve abducens nerve superior opthalmic vein
trochlear nerve –>
superior orbital fissure
opthalmic nerve (v1) –>
superior orbital fissure
maxillary (v2) –>
foramen rotundum
mandibular (V3) –>
foramen ovale
abducens –>
superior orbital fissure
facial nerve –>
internal acoustic meatus
vestibulocochlear (CN8) –>
internal acoustic meatus
glossopharyngeal (CN9) –>
jugular foramen
vagus (CN10) –>
jugular foramen
accessory (CN11) –>
jugular foramen
hypoglossal (CN12) –>
hypoglossal canal
what components pass through the jugular foramen
inferior petrosal sinus glossopharyngeal vagus accessory nerve sigmoid sinus posterior meningeal artery
the middle meningeal artery passes through what structure in the skull
foramen spinosum
with the meningeal branch of the mandibular nerve
what forms the basiliar artery
the joining of the right and left vertebral arteries
what branches do the vertebral arteries give off before joining to form the basilar artery?
posterior inferior cerebellar artery (PICAs)
posterior spinal arteries
anterior spinal arteries
what branches off the basilar artery?
pontine branches
labyrinthine arteries
anterior inferior cerebellar arteries (AICAs)
superior cerebellar artery
posterior cerebral artery (terminal branches)
describe the progression of the internal carotid artery as it enters the cranial cavity
enters through the carotid canal passes through the cavernous sinus gives off the opthalmic artery branches into posterior communicating artery branches into anterior cerebral artery continues as the middle cerebral artery
the anterior communicating artery allows for communication between what vessels
anterior cerebral arteries from the internal carotid
the posterior communicating arteries allow for communication between what arteries
posterior cerebral and internal carotid
what arteries make up the circle of willis
posterior cerebral arteries posterior communicating internal carotid anterior cerebral anterior communicating
